miercuri, 17 iunie 2009

Diamonds are forever!

Diamond is the hardest natural material known to man and can only be cut by other diamonds. Its hardness means it maintains its polish excellently and resists scratching, making it ideal for use in designer jewellery. The durability and beauty of diamonds has made them a very popular choice.

About 49% of diamonds originate from central and southern Africa. However, significant sources of the mineral have also been discovered in Canada, India, Russia, Brazil, and Australia. The hardest diamonds in the world are from the New England area in New South Wales, Australia. These diamonds are generally small, perfect to semi-perfect octahedrans (a three-dimensional shape with eight faces) and are used to polish other diamonds.

Different coloured diamonds are usually treated – they can be found naturally, but this is extremely rare. ‘Fancy diamonds’, as they are called, are popular for use in fine jewellery because they are rare and exotic-looking.

Orange Diamonds
This was the first coloured diamond ever to be produced synthetically and for a long time, the only colour available. These are often similar in colour to amber or topaz, but are considerably harder and brighter and reflect more light. Their flame-like colour makes them particularly popular in fine jewellery.

Black Diamonds
These are coloured black as a result of inclusions, possibly with traces of sulphide. These have begun to be particularly fashionable in designer jewellery in recent years. They are very rare and therefore extremely expensive – currently demand considerably exceeds supply, and this is being rectified by creating a supply of treated black diamonds.

Pink Diamonds
These rank amongst the most expensive gemstones in the world and have recently enjoyed considerable popularity with celebrities.

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